Air-water interface methane and carbon dioxide on-line monitoring system and method thereof

A carbon dioxide and methane technology, applied in the field of natural gas hydrate research, can solve problems such as natural gas hydrate decomposition, sampling back to the laboratory for testing, and rising seawater temperature, achieving the effect of long delay

Inactive Publication Date: 2017-10-20
OIL & GAS SURVEY CGS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Global warming leads to an increase in seawater temperature, resulting in the decomposition of seabed gas hydrate
Therefore, the present invention proposes an on-line monitoring method of methane/carbon dioxide at the water-air interface, which solves the disadvantages

Method used

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  • Air-water interface methane and carbon dioxide on-line monitoring system and method thereof
  • Air-water interface methane and carbon dioxide on-line monitoring system and method thereof

Examples

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Embodiment Construction

[0018] Such as figure 1 As shown, this water-air interface methane carbon dioxide online monitoring system includes: a water pump, a water-gas separation device, a drying device, and a laser detector;

[0019] Install a water pump in water containing soluble methane and carbon dioxide, and use a sealed tank to connect the water pump to the water-gas separation device on the surface. The gas generated after separation is collected by a drying device and detected by a laser detector.

[0020] Such as figure 2 Shown, also provide a kind of water-air interface methane carbon dioxide online monitoring method, it comprises the following steps:

[0021] (1) Install water pumps in the underground water body;

[0022] (2) After extracting the in-situ water body, conduct water-gas separation;

[0023] (3) produce water and dissolved gas after separation;

[0024] (4) Gas composition and content analysis;

[0025] (5) Long-term monitoring in order to explore the law.

[0026] The ...

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Abstract

The invention relates to an air-water interface methane and carbon dioxide on-line monitoring system, which solves the disadvantage that in the prior art, methane concentrations in different systems only can be sampled in a laboratory for detection, and the influence of natural gas hydrate decomposition on circumference environment under different angles can be realized. The on-line monitoring system comprises a water pump, an air-water separator, a drying device and a laser detector; a water pump is arranged in the water containing methane with dissolvability and carbon dioxide, a sealing tank is used for connecting with the water pump and the surficial air-water separator, the gas generated after separation is collected through the drying device, and detection is carried out through the laser detector. The invention also provides an air-water interface methane and carbon dioxide on-line monitoring method.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate research, in particular to an online monitoring system and method for methane and carbon dioxide at the water-air interface. Background technique [0002] Natural gas hydrate (Natural Gas Hydrate) is an ice-like, non-stoichiometric, clathrate solid compound composed of water and small guest gas molecules at low temperature and high pressure, commonly known as "combustible ice", because the gas component in it is mainly methane, so Also known as methane hydrate (Methane Hydrate). Natural gas hydrate has a high energy density. Under ideal conditions, 1m 3 The natural gas hydrate can be decomposed into 164m 3 methane gas and 0.8m 3 of water. The natural gas hydrate reserves on the earth are very rich, and the natural gas hydrates are widely distributed in permafrost regions, deep-sea sediments and deep lake sediments at the edge of the continental shelf, and the carbon storage in the ...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N1/28G01N1/34
CPCG01N21/01G01N1/28G01N1/34G01N2021/0112
Inventor 黄霞祝有海庞守吉高相宇王明君王平康张帅肖睿
Owner OIL & GAS SURVEY CGS
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